Attic insulation

I've been reading and reading and reading. I have more questions than answers but no one will accuse me of not researching. I'm ''cursed" by having my bedroom under the attic and over the garage. As you might imagine, it's freezing. My first intended project is the attic. Here are some pictures and I will refer to them as I make my questions.
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Attic insulation

There appears to be 2 posts (posted by me). One is incomplete of all my info. Please see my post with the time of posting being 3:55pm for a full description of what I'm talking about. That should clear up what I'm talking about. Not talking about anything to do with the garage right now. These are not pictures of a garage. This is the attic. You will see upon reading that post